Oiling device



Sept 5, l939.' B F, SHEPHERD 2,7Z,092

OILING DEVICE F'iled June 14, 1938 H l S ATTORNEY.

Patented Sept. 5, 1939 UNH'ED STATES PATENT OFFIQE OILING DEVICE Application June 14,

1 Claim.

This invention relates to oiling devices, and more particularly to an oiling device adapted to be interposed in the supply line of pressure fluid machines.

Included in this class of machines are rock drills and similar percussive tools which have been found to operate more eiciently if the oil is supplied to the movable parts in a nely atomized state and in quantities just suicient to assure smooth running. It is, of course, essential that the oil be supplied to the machine continuously and for this reason a constant supply of oil should be available, otherwise the movable parts of the machine will become damaged. While these conditions are well understood by those engaged in operating machines of this character it, nevertheless, happens frequently that even though it is known that the oil Supply is dangerously low the operation of the machine is continued because of the time required to rell the oiling device from the usual source ofv supply.

t is accordingly an object of the present invention to enable the oil supply to be quickly and easily replenished.

Another object is to minimize the chances of introducing dirt into the oil supply.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference numerals refer to similar parts,

Figure l is a plan View, partly broken away, of an oiling device constructed in accordance with the practice of the invention,

Figure 2 is a longitudinal View, in elevation, of the oiling device, and

Figure 3 is a transverse View taken through Figure 2 on the line 33.

Referring more particularly to the drawing, 20 designates a casing having a wall 2l extending therethrough to divide the casing into an oil compartment 22 and into a passageway 23.

The passageway 23 constitutes a portion of a supply line leading from a source of pressure uid supply to a machine intended to be operated by the pressure uid and its ends are accordingly provided with internal threads 24 for engagement with sections 25 of the pressure fluid supply line.

The passageway 23 and the compartment 22 are in communication with each other through a pair of passages 26 and 21. The passages 26 and 21 are crossed to preclude the chances of inadvertently draining oil into the passageway 23. The passage 26 serves the function of conveying oil from the compartment 22 into the pas- 1938, Serial No. 213,563

sageway, and the passage 21 conveys pressure iiuid from the passageway into the compartment to maintain a pressure on the surface of the oil in the compartment.

In the construction shown the passage 21 leads 5 to the lowermost portion of the passageway 23 and extends partly through a plug 28 arranged transversely of the passageway 23. The passage 21 has an outlet opening 29 extending transversely of the plug 28 and lying in the direction 10 of ow of pressure fluid in the passageway 23.

The passage 26, on the other hand, leads to the upper side of the passageway 23 and is also continued through the plug 28 and has an outlet opening 30 extending transversely of the plug 28, 15 although at a right angle to the outlet 29. A portion 3i of the passage 26 in the plug 28 is enlarged and contains a needle valve 32 having a threaded portion 33 to enable the needle valve to be adjusted for controlling the ow area 20 through the passage 26 and, therefore, the quantity of oil which may be delivered into the passageway 23.

The plug 28 may be secured in the casing 20 as by a press t, and in the portion of the casing 25 encircling the uppermost end of the plug 28 is a recess 3i@ which is normally sealed by a plug 35.

Although the compartment 22 is intended more particularly for the reception of oil in cans, such as that designated by 36, it is enlarged to assure 30 additional storage capacity for oil and, in accordance with the practice of the invention, is provided with an opening 31 in its top through which cans 36 of oil may be introduced into the container. 'Ihe opening 31 is normally sealed by 35:

a cover 38 threaded to a boss 39 of the casing 20, and in the cover 38 is a punch 40 which, when the cover 38 is threaded to the boss 39, penetrates the top 4l of the can 36 to form a vent 42 for the admission of pressure fluid into the can 36,

The punch 40 may be aixed to the cover 38 in any well known manner. The portion or point 43 of the punch intended to pierce the top 4| is preferably in the form of a half-cone. Thus, as the punch is being rotated through the instrumentality of the cover 38, the coniform surface of the punch will displace the metal of the top 4| and sufficient space will exist between the inner or iiat surface 44 of the punch and the wall of the vent 42 to permit of the free entrance of pressure fluid 50 into the can 36.

Preferably a series of suitably spaced lugs 45 are provided on the outer surface of the cover 38 to act as abutments for a rod or other instrument whereby the cover may be rotated.

The casing is further provided with a punch 46 in the lower surface of the compartment. The punch 46 may, as shown, be threadedly connected to the casing 20. It extends upwardly into the compartment and pierces the bottom 41 of the can 36 to provide an outlet 48 in the can. The punch 46 is also of substantially coniform shape and is provided with a series of recesses 49 in its periphery through which the oil may flow into the compartment.

In the operation of the device, Whenever it .becomes necessary to replenish the supply of oil the' cover 38 is removed from the casing 2U. A can. 36 of oil is then placed in the compartment 22 and sufcient pressure may be applied to the can to cause the punch 45 to pierce the bottom 41. Thereafter the cover 38 is threaded to the boss 39 Vand during this operation the punch 40 pierces the top 4l and forms the vent 42.

In structures such as that shown in the drawing in which the compartment 22 has a capacity in excess of that required to accommodate the can 36 the contents of a can may first be poured into the compartment and a second can placed in the compartment before the cover 38 is threaded in position. Thereafter the cans may be replaced at suitably spaced intervals to assure a plentiful supply for the machine for which the oil is intended.

In practice, the present invention has been found to be highly desirable in devices of this character since it enables the oil to be replenished with a minimum expenditure of time and Without danger of spilling the oil or of introducing foreign matter into the oil stream.

I claim:

An. oiling device, comprising a casing having a passageway and a compartment to receive an oil container, there being crossed passages in the wall of the casing to convey pressure fluid from the passageway to the compartment and oil from the compartment to the passageway, means for controlling the flow of'oil into the passageway, a cover for the compartment, punches on the cover and the casing to pierce the ends of an oil container and one of said punches having a passage to convey oil from such container into the compartment.

BENJAMIN F. SHEPHERD. 

